<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var name = "John"
        var age = 30

        //在info获取name和age的值，并且age值+1
        //做法：使用模板字符串 + 表达式实现
        //模版字符串符号写法：`...${expression}...`
        var info = `name is ${name}, age is ${age+1}`
        console.log(info) //name is John, age is 31
    </script>
</body>
</html>